Filter



Patented Dec. 5,Y i927.

ritirare.V l

Application llcdianuary 8, 1927. lYSerial No. 159,306.

This Vinvention relates toiilters. y

Objects of this invention are to provide a novel formV of filter inwhich compressed granulatedV cork is used, and in which a novel mannerof charging and 'reconditioning the filter so as to apply pressure tothe cork secured.

Further objects are to provide a small or medium sized filter of lightweight which is easy tovinstall and is convenient to recondition whenexhausted, and which has Van especially large capacity and higheiiiciency.

Further objects are to provide a new type of filter which isparticularly adapted for domestic and similar uses, and Awhich as statedalthough madein small siaes has `an exceptionally large capacity.,

vFurther objects are to provide av novel form of filter which providesfer the easy filling with cork and for theA easy removal of the corkafter the cork has been in use a great length of time.' A

A further object of this invention is to provide a novel method ofcompressing granulated cork in a filter so that lnojadditional mechanismis required 'for securing this compression.

An embodiment of the invention is shown in the accompanying drawings finwhich: j'

The single 'view illustrates the filter part'- ly in section andconnected tothe supply and discharge pipes. j

Referring to the drawing,fa cylindrical vessel or tank 1 is closed hy abet-tom 2 and a head 3.V A conical `screen el'made of per'- foratedmetal is secured to the bottom'2 by means of a bolt 5 and nut 6 so thatits central part is clamped between the bottoni and a washer 7, The headof the bolt 5 is weldl Ved on 4the outside tothe bottom 2 to form atightjoint. The base of the conical screen 4i fits the inside of the tank lclosely and eX- tends a sufficient distance above the bottomV 2 togivevroom for the inlet opening 8 between said bottom and base.V Theconicalv shape of the screen not only gives it strength for resistingpressure from lthe 1nside of' the tank,'but lalso Iorms a circular space9 extending all around the tank, which V gives any liquid entering theopening 8 Vfree access to every part ofthe-screen Li. Another conicalscreen 10,y cut lout at Vits center, is riveted or otherwise fastened tothe saddlevflange 11 which is tapped to receive a nipple 12. This nipplel2 extends through outlet opening 14.`

joint, and is closed by acap 18. The outer edge of the screen 1 0 has aclose'fit with the inside'of tank land extends far enough into thetankto make room fory the outlet opening 14. The vconical shape ofscreen 1 gives it strength to resist pressure rfrom the inside ol'thetank 1, and at thesame time, forms'a l circular space v15 extendingall the head 3, is Welded thereto to make aitight l around t-he tank,whichgivesjall the liquidV coming through screen 10 free access totheAlthough` any filtering material incommon use may be employed, this'filter is particularlyv eflective when filled with granulated corkin'compression. The dryfcorkis first introduced through the nipple 12afterv cap 13 has been removed. l/Vhen the lter is full, acertam excessamount of cork is forced in, after which the cap 13 is replaced, therebyclosingthe filter entirely. The rawA water to be filtered is nowintroduced throughl pipe into the bottom space 9 'from where it isrorced upwards through the cork.v land finally through the perforationsofthe Vup-y per screen k10 intoy space 15 and out-through l i opening 14intothe service pipe 17, As

soon as the vair has been displaced andthe cork thoroughlysoaked adesired lpressure y created by expansion within the filter where-V bythe cork iscompressed until thepores or small openings vbetweenthegrains are closed eign matter previously held in suspension andemergesperfectly clear.` I j,

When the `capacity of the cork to absorb ,to a point whereVthewaterin"passingleaves behind 'every Aparticle of'dirtand other` for`the foreign particles ceases, the filter Ais ex` hausted and the cork isfloated out through, y lthe nipple 12, without lthe necessity otdisconnecting the filter. `After draining the.

filter, new cork'is insertedV or the old cork may be used over againafter having been eiiiciently cleaned. A valve 18 is placed in` the pipeline 16and a valve 19 is placed in the pipe line 17 for controlling thefilter.-

If desired, a bypass pipe'` 21 and valve 20. f

ymay be provided forv permitting a direct y.iiow of water from thesupply pipe to theV service pipe during the renovation'o the filter.

`While flow is equally efficient. j a* Y Y j Inactu'al' tests'conductedwith filters dej y the water has been assumed to flow'y upwards through'theV filter, va downward 110.

ter of only 12 inches and a height of 18 inches of cork showed anefciency of nearly 100% by visibility test after having iltered`20,000

gallons of ordinary dirty cistern water. o

It Will be seen that novel type of filter has been provided by thisinvention which although applicable to a variety of uses is neverthelessparticularly well adaptedtor domestic use, as it may be made relativelysmall and compact and as it is very easy to install. l i

Further, the filter is so made, as described in detail above, that theprocess of compress ingr the cork maybe very vreadily followed.,

' as all 'that is necessary is to press the final cork in place throughlthe filling tube while the cork is in a dry condition. lThe subsetweens'aid screens,vmeans forconducting a .liquidV to andl from said filterand opening on the outer side of said screens, a filling tube extending`through the upper part of said body portion through which the granu-vlated cork may be inserted or removed, said filling 4tube eitendin'gthrough `the screen ad;

jacent the upper part of ythe body portion, andiheans orclosing saidiilling tube. V

2. A lt'ercomprisinga closed-body por tion. a pair'of screens carriedwithin said body.v portion adjacent its ends, granulated closed bodyporcork carried within said body portion between said screens, means forconducting a liquid to and from said filter and opening on the outerside ot said screens, a filling tube extending through the upper partof' said body portion through which the granulated cork may beinsertedor removed, and means for closing` said filling tube, saidlilling tube having its inner end extending through one ot' saidscreens.

3. VA device of the class described comprising a cylindrical bodyportion having .a

bottom and a top, an upwardly flaring conitubo projectingy through saidtop, a downwardly Haring conical screeny carried byk said filling: tube,a' cap for said filling tube, a pipe opening into the spacebetween saidfirst mentioned screen and thevbottom, a pipe opening into the spacebetween said second mentioned screen and the top, and

liquid treating material carried within said f body portion and betweensaid screens. V

et. A Yfilter comprising an upright body portion having a bottom andatop, a screen carried by said bottom and spaced therefrom,

an upper screen spaced from the top, a fillingr tube passing through'said top and supporting said upper screen, said tube opening below saidupper screen and said` upper screen converging towards said tube, pipesopening into the space between they bottom andk 'theftop and thecorresponding screens, gran-V ulated cork carried within said bodyportion and between said screens, and a removable ciosure for said tube,whereby said cork may Abe floated out of said filling tube and new corkinserted.

In testimony that 'I claim the foregoing I have hereunto set my handatFort'VVayne, in the county of Allen and State of Indiana,

JOHN AlsTnoM.

`cal screen secured to said bottom, a fillingv

